Replica set

Replica set 는 홀수개를 운영해야함

- 노드가 짝수개밖에 없으면, 포트번호로 추가지정가능

Primary : 

Secondary : 

Arbiter : heart bit 역할, 부하거의 없음

cd ~/mongodb

rm -rf data/db

mkdir -p data/db

./bin/mongod --dbpath data/db  --replSet test1 --oplogSize 1

C:\mongodb\bin>mongo.exe s1:27017

2017-01-25T09:36:31.983+0900 Hotfix KB2731284 or later update is not installed, will zero-out data files

MongoDB shell version: 2.6.12

connecting to: s1:27017/test

> use admin

switched to db admin

> rs.initiate()

{

        "info2" : "no configuration explicitly specified -- making one",

        "me" : "s1.test.com:27017",

        "info" : "Config now saved locally.  Should come online in about a minute.",

        "ok" : 1

}

>

test1:PRIMARY>

test1:PRIMARY> rs.con

rs.conf(        rs.config(      rs.constructor

test1:PRIMARY> rs.conf()

{

        "_id" : "test1",

        "version" : 1,

        "members" : [

                {

                        "_id" : 0,

                        "host" : "s1.test.com:27017"

                }

        ]

}

test1:PRIMARY> cfg = rs.conf()

{

        "_id" : "test1",

        "version" : 1,

        "members" : [

                {

                        "_id" : 0,

                        "host" : "s1.test.com:27017"

                }

        ]

}

test1:PRIMARY> cfg.members[0].host = "s1:27017";

s1:27017

test1:PRIMARY> rs.reconfig(cfg);

2017-01-25T09:40:17.336+0900 DBClientCursor::init call() failed

2017-01-25T09:40:17.338+0900 trying reconnect to s1:27017 (192.168.56.101) failed

2017-01-25T09:40:17.340+0900 reconnect s1:27017 (192.168.56.101) ok

reconnected to server after rs command (which is normal)

test1:PRIMARY> rs.add("s2:27017");

{ "ok" : 1 }

test1:PRIMARY> rs.addArb("s3:27017");

{ "ok" : 1 }

test1:PRIMARY> rs.conf()

{

        "_id" : "test1",

        "version" : 4,

        "members" : [

                {

                        "_id" : 0,

                        "host" : "s1:27017"

                },

                {

                        "_id" : 1,

                        "host" : "s2:27017"

                },

                {

                        "_id" : 2,

                        "host" : "s3:27017",

                        "arbiterOnly" : true

                }

        ]

}

test1:PRIMARY> rs.status()

{

        "set" : "test1",

        "date" : ISODate("2017-01-25T00:41:16Z"),

        "myState" : 1,

        "members" : [

                {

                        "_id" : 0,

                        "name" : "s1:27017",

                        "health" : 1,

                        "state" : 1,

                        "stateStr" : "PRIMARY",

                        "uptime" : 613,

                        "optime" : Timestamp(1485304834, 1),

                        "optimeDate" : ISODate("2017-01-25T00:40:34Z"),

                        "electionTime" : Timestamp(1485304638, 1),

                        "electionDate" : ISODate("2017-01-25T00:37:18Z"),

                        "self" : true

                },

                {

                        "_id" : 1,

                        "name" : "s2:27017",

                        "health" : 1,

                        "state" : 2,

                        "stateStr" : "SECONDARY",

                        "uptime" : 43,

                        "optime" : Timestamp(1485304834, 1),

                        "optimeDate" : ISODate("2017-01-25T00:40:34Z"),

                        "lastHeartbeat" : ISODate("2017-01-25T00:41:15Z"),

                        "lastHeartbeatRecv" : ISODate("2017-01-25T00:41:16Z"),

                        "pingMs" : 0,

                        "syncingTo" : "s1:27017"

                },

                {

                        "_id" : 2,

                        "name" : "s3:27017",

                        "health" : 1,

                        "state" : 7,

                        "stateStr" : "ARBITER",

                        "uptime" : 42,                                                            <= Arbiter는 OPtime 없음

                        "lastHeartbeat" : ISODate("2017-01-25T00:41:16Z"),

                        "lastHeartbeatRecv" : ISODate("2017-01-25T00:41:16Z"),

                        "pingMs" : 0

                }

        ],

        "ok" : 1

}

test1:PRIMARY>

use test

for (var i=0; i < 10000; i++) {

   db.user.save({name:"john"+i, age:20 + (i%10) })

}

C:\mongodb\bin>mongo.exe s2:27017

2017-01-25T09:44:49.448+0900 Hotfix KB2731284 or later update is not installed, will zero-out data files

MongoDB shell version: 2.6.12

connecting to: s2:27017/test

test1:SECONDARY>

test1:SECONDARY> use test

switched to db test

test1:SECONDARY> db.user.findOne()

2017-01-25T09:45:12.489+0900 error: { "$err" : "not master and slaveOk=false", "code" : 13435 } at src/mongo/shell/query.js:131

test1:SECONDARY> rs.slaveOk();

test1:SECONDARY> db.user.findOne()

{

        "_id" : ObjectId("5887f4bc514b2dcdfa1a4554"),

        "name" : "john0",

        "age" : 20

}

test1:SECONDARY> db.user.insert({name :"obama", age:60});

WriteResult({ "writeError" : { "code" : undefined, "errmsg" : "not master" } })

test1:SECONDARY>

[Oplog]

test1:PRIMARY> use test

switched to db test

test1:PRIMARY> db.user.insert({ name :'gdhong', age:20})

WriteResult({ "nInserted" : 1 })

test1:PRIMARY> db.user.update({name:'gdhong'}, { $set : { age:30 }})

WriteResult({ "nMatched" : 1, "nUpserted" : 0, "nModified" : 1 })

test1:PRIMARY>

test1:PRIMARY> use local

switched to db local

test1:PRIMARY>

test1:PRIMARY> db.oplog.rs.find().sort({ts:-1}).limit(2).pretty();

{

        "ts" : Timestamp(1485305312, 1),

        "h" : NumberLong("-2545699453346556688"),

        "v" : 2,

        "op" : "u",

        "ns" : "test.user",

        "o2" : {

                "_id" : ObjectId("5887f5df514b2dcdfa1a6c64")

        },

        "o" : {

                "$set" : {

                        "age" : 30

                }

        }

}

{

        "ts" : Timestamp(1485305311, 1),

        "h" : NumberLong("-4829261684578901723"),

        "v" : 2,

        "op" : "i",

        "ns" : "test.user",

        "o" : {

                "_id" : ObjectId("5887f5df514b2dcdfa1a6c64"),

                "name" : "gdhong",

                "age" : 20

        }

}

[Primary 죽이기]

2017-01-25T09:52:21.070+0900 [initandlisten] connection accepted from 192.168.56.103:52089 #57 (5 connections now open)

2017-01-25T09:52:32.578+0900 [conn56] end connection 192.168.56.102:57793 (4 connections now open)

2017-01-25T09:52:32.579+0900 [initandlisten] connection accepted from 192.168.56.102:57795 #58 (5 connections now open)

^C2017-01-25T09:52:45.426+0900 [signalProcessingThread] got signal 2 (Interrupt), will terminate after current cmd ends

2017-01-25T09:52:45.427+0900 [signalProcessingThread] now exiting

2017-01-25T09:52:45.427+0900 [signalProcessingThread] dbexit: 

2017-01-25T09:52:45.427+0900 [signalProcessingThread] shutdown: going to close listening sockets...

2017-01-25T09:52:45.427+0900 [signalProcessingThread] closing listening socket: 7

2017-01-25T09:52:45.427+0900 [signalProcessingThread] closing listening socket: 8

2017-01-25T09:52:45.427+0900 [signalProcessingThread] removing socket file: /tmp/mongodb-27017.sock

2017-01-25T09:52:45.428+0900 [signalProcessingThread] shutdown: going to flush diaglog...

2017-01-25T09:52:45.428+0900 [signalProcessingThread] shutdown: going to close sockets...

2017-01-25T09:52:45.428+0900 [signalProcessingThread] shutdown: waiting for fs preallocator...

2017-01-25T09:52:45.428+0900 [signalProcessingThread] shutdown: lock for final commit...

2017-01-25T09:52:45.428+0900 [signalProcessingThread] shutdown: final commit...

2017-01-25T09:52:45.430+0900 [conn2] end connection 192.168.56.1:49553 (4 connections now open)

2017-01-25T09:52:45.430+0900 [conn11] end connection 192.168.56.102:57746 (4 connections now open)

2017-01-25T09:52:45.431+0900 [conn57] end connection 192.168.56.103:52089 (4 connections now open)

2017-01-25T09:52:45.431+0900 [conn58] end connection 192.168.56.102:57795 (4 connections now open)

2017-01-25T09:52:45.433+0900 [signalProcessingThread] shutdown: closing all files...

2017-01-25T09:52:45.434+0900 [signalProcessingThread] closeAllFiles() finished

2017-01-25T09:52:45.434+0900 [signalProcessingThread] journalCleanup...

2017-01-25T09:52:45.434+0900 [signalProcessingThread] removeJournalFiles

2017-01-25T09:52:45.473+0900 [signalProcessingThread] shutdown: removing fs lock...

2017-01-25T09:52:45.493+0900 [signalProcessingThread] dbexit: really exiting now

[client1]

test1:PRIMARY>

2017-01-25T09:52:57.649+0900 DBClientCursor::init call() failed

>

[client2]

test1:SECONDARY>

test1:PRIMARY>

다시 살리면

[mongodb@s1 mongodb]$ ./bin/mongod --dbpath data/db  --replSet test1

2017-01-25T09:55:18.797+0900 [initandlisten] MongoDB starting : pid=9101 port=27017 dbpath=data/db 64-bit host=s1.test.com

2017-01-25T09:55:18.812+0900 [initandlisten] db version v2.6.9

2017-01-25T09:55:18.813+0900 [initandlisten] git version: df313bc75aa94d192330cb92756fc486ea604e64

2017-01-25T09:55:18.813+0900 [initandlisten] build info: Linux build20.nj1.10gen.cc 2.6.32-431.3.1.el6.x86_64 #1 SMP Fri Jan 3 21:39:27 UTC 2014 x86_64 BOOST_LIB_VERSION=1_49

2017-01-25T09:55:18.813+0900 [initandlisten] allocator: tcmalloc

2017-01-25T09:55:18.813+0900 [initandlisten] options: { replication: { replSet: "test1" }, storage: { dbPath: "data/db" } }

2017-01-25T09:55:18.841+0900 [initandlisten] journal dir=data/db/journal

2017-01-25T09:55:18.841+0900 [initandlisten] recover : no journal files present, no recovery needed

2017-01-25T09:55:18.864+0900 [initandlisten] waiting for connections on port 27017

2017-01-25T09:55:18.974+0900 [rsStart] replSet I am s1:27017

2017-01-25T09:55:18.974+0900 [rsStart] replSet STARTUP2

2017-01-25T09:55:18.974+0900 [rsSync] replSet SECONDARY

2017-01-25T09:55:18.975+0900 [rsMgr] replSet can't see a majority, will not try to elect self

2017-01-25T09:55:18.977+0900 [rsHealthPoll] replset info s2:27017 thinks that we are down

2017-01-25T09:55:18.977+0900 [rsHealthPoll] replSet member s2:27017 is up

2017-01-25T09:55:18.977+0900 [rsHealthPoll] replSet member s2:27017 is now in state PRIMARY

2017-01-25T09:55:18.981+0900 [rsHealthPoll] replset info s3:27017 thinks that we are down

2017-01-25T09:55:18.981+0900 [rsHealthPoll] replSet member s3:27017 is up

2017-01-25T09:55:18.981+0900 [rsHealthPoll] replSet member s3:27017 is now in state ARBITER

2017-01-25T09:55:19.456+0900 [initandlisten] connection accepted from 192.168.56.102:58213 #1 (1 connection now open)

2017-01-25T09:55:20.133+0900 [initandlisten] connection accepted from 192.168.56.103:52538 #2 (2 connections now open)

2017-01-25T09:55:20.150+0900 [conn2] end connection 192.168.56.103:52538 (1 connection now open)

2017-01-25T09:55:20.150+0900 [initandlisten] connection accepted from 192.168.56.103:52539 #3 (3 connections now open)

2017-01-25T09:55:20.456+0900 [conn1] end connection 192.168.56.102:58213 (1 connection now open)

2017-01-25T09:55:20.457+0900 [initandlisten] connection accepted from 192.168.56.102:58214 #4 (2 connections now open)

2017-01-25T09:55:23.976+0900 [rsBackgroundSync] replSet syncing to: s2:27017

2017-01-25T09:55:23.978+0900 [rsBackgroundSync] replset setting syncSourceFeedback to s2:27017

2017-01-25T09:55:28.462+0900 [conn4] end connection 192.168.56.102:58214 (1 connection now open)

2017-01-25T09:55:28.463+0900 [initandlisten] connection accepted from 192.168.56.102:58216 #5 (2 connections now open)

2017-01-25T09:55:33.806+0900 [initandlisten] connection accepted from 192.168.56.1:49562 #6 (3 connections now open)

2017-01-25T09:55:46.169+0900 [conn3] end connection 192.168.56.103:52539 (2 connections now open)

2017-01-25T09:55:46.169+0900 [initandlisten] connection accepted from 192.168.56.103:52541 #7 (3 connections now open)

2017-01-25T09:55:58.482+0900 [conn5] end connection 192.168.56.102:58216 (2 connections now open)

2017-01-25T09:55:58.483+0900 [initandlisten] connection accepted from 192.168.56.102:58218 #8 (3 connections now open)

C:\mongodb\bin>mongo.exe s1:27017

2017-01-25T09:55:33.809+0900 Hotfix KB2731284 or later update is not installed, will zero-out data files

MongoDB shell version: 2.6.12

connecting to: s1:27017/test

test1:SECONDARY>

test1:SECONDARY> db.isMaster()

{

        "setName" : "test1",

        "setVersion" : 4,

        "ismaster" : false,

        "secondary" : true,

        "hosts" : [

                "s1:27017",

                "s2:27017"

        ],

        "arbiters" : [

                "s3:27017"

        ],

        "primary" : "s2:27017",

        "me" : "s1:27017",

        "maxBsonObjectSize" : 16777216,

        "maxMessageSizeBytes" : 48000000,

        "maxWriteBatchSize" : 1000,

        "localTime" : ISODate("2017-01-25T01:01:12.168Z"),

        "maxWireVersion" : 2,

        "minWireVersion" : 0,

        "ok" : 1

}